Guide GearA(R) Men's Merino Wool Blend Midweight Boot Socks make you feel great all around and are perfect for everyday wear. Wool-blend comfort with lightweight cushioning underfoot feels great to wear. Plus, it's naturally antimicrobial, sweat-wicking and fast-drying. Wool blend, midweight Boot Socks 72/26/2 merino wool/nylon/spandex Sustainable merino wool Moisture wicking Antimicrobial Boot height Made in the USASizing Information Medium fits men's shoe size 6-8.5 Large fits men's shoe size 9-12 X-Large fits men's shoe size 12.5-15